通过Zr+Ti,Ti+WC以及Zr+Ti+WC的复合添加,运用激光熔覆技术在中碳钢表面原位合成了颗粒增强铁基复合材料涂层,研究了复合碳化物颗粒相的形貌特征.结果表明,当Zr+Ti复合添加时,颗粒相具有包覆结构;当Ti+WC复合添加时,颗粒相易长大成花瓣状,具有层状结构;当Zr+Ti+WC复合添加时,若WC含量较低,颗粒相具有不规则多边形特征,随着WC含量的增加,颗粒相逐渐长大成花瓣状甚至粗大的树枝晶状.通过热力学计算,对复合碳化物的形成过程进行了讨论.
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